#include <stdio.h>
void swap(int *p_val, int *p_val1) {
	int tmp = 0;
	tmp = *p_val;
	*p_val = *p_val1;
	*p_val1 = tmp;
}
int main() {
	int val = 3, val1 = 7;
	swap(&val,&val1);
	printf("val=%d,val1=%d\n",val,val1);
	return 0;
}
